Strain-insulator.



No. 834,392. PATENTED OCT. so, 1906.

G. A. MEAD. STRAIN INSULATOR.

APPLICATION FILED APE. 22.1906.

, 4 gggggmmmmmbi Jfi mi 71' GEORGE A. MEAD, OF MANSFIELD, OHIO.

STRA'lN-INSULATOR.

Specification of Letters Patent.

. Patented Oct. so, 1906.

Application filed April 22, 1905. Serial No. 256,920.

To all whom, it may concern:

Be it known that I, GEORGE A. MEAD, a citizen of the United States,residing at Mansfield, in the county of Richland and State of Ohio, haveinvented a new and usefullmprovement in Strain-Insulators, of which thefollowmg 1s, a specification.

This invention relates to strain-insulators.

The object of the invention is to provide a construction ofstrain-insulator for use in insulating large conductors from otherconductors or the ground and which is simple in construction,economical, strong, and durable.

The inventionconsists substantially in the construction, combination,location, and arrangement of parts, all as Wlll be more fullyhereinafter set forth, as shown in the accompanying drawings, andfinally pointed out in the appended claims.

Referring to the accompanying drawings, and to the various views andreference-signs appearing thereon, Figure 1 is a view, partly insideelevation and partly in longitudinal section, showing a construction ofstrain-insulator embodying the principles of my invention. Fig. 2 is atransverse section on the line 2 2, Fig. 1, looking in the direction ofthe arrows. Fig. 3 is a view similar to Fig. 2, showing aslightly-modified arrangement embraced within the spirit and scope of myinvention. Fig. 4 is a view in section, parts broken off, showing amodified construction embraced within the spirit and scope of myinvention.

The same part is designated by the same reference-sign wherever itoccurs throughout the several views.

Reference-sign A designates a bolt or sleeve open at one end andprovided with a flanged head B at the other end. The shank portion ofbolt A, as well as the head portion B thereof, is inclosed withininsulating material, (indicated by reference-sign (1,) the end of theshank portion of bolt A extending beyond the end of the insulation andbeing exteriorly threaded, as indicated at D.

E designates a flanged cap adapted to be screwed upon the threaded endor portion D of bolt A and forming a retainer for the circular flange Fof a nut G, thereby permitting the nut to rotate axially while beingretained in place.

H designates the eye of an eyebolt, the shank J of which is threadedlongitudinally through the nut G, said shank extending into the interiorof the body A.

K designates a flanged cap interiorly screw-threaded and adapted to besleeved onto the body and project over the head B of body A and itsinclosing insulation, as clearly shown, and into the threaded portion ofwhich is screwed the base of an eyepiece L, lips M serving to maintainthe cap K and the eye L in place. The body A and'its surroundinginsulation C may be held from axial rotation within or relative to thecap K in any suitable or convenient manneras, for instance, bysurrounding the enlarged head of insulating material in the space be,-tween the peripheral surface of such head and cap K with a sulfurcomposition, as indicated at N. (See Figs. 1 and 2.) The same result maybe attained in many other specifically different ways. For' instance, asshown, in Fig. 3, interlocking ribs and seats (indicated at P) may beformed in the interior surface of cap K and the exterior surface of theenlarged head of insulating material C. The particular means employedare unimportant, the important feature being that relative rotativemovement of cap K and body or bolt A and its surrounding insulation isprevented.

The operation is as follows: The supporting and the supported conductorsare strung through the eyes L and H. Then by applying a suitable wrenchor other tool to the nut G and turning said nut the eye H is drawn intoor caused to recede out of the body or bolt A, thereby causing the eyesto approach or recede from each other as may be necessary for producingthe requisite strain on the span-wire or other connections to which theeyes may be secured. If desired, and in order to prevent the cap E fromworking loose, a set-screw R may be employed and adapted to be tappedthrough cap E and into the body A, as clearly shown in Fig. 1.

In Fig. 4 I have shown a modified arrangement wherein the threaded shankJ of eyebolt H is threaded through a nut G, the flange F of which iscast within the interior of the body A, the latter being formed with theshoulder D at its end or being cast around the flanged nut G, the bodyof said bolt A being inclosed within insulating material C. 1n otherrespects the structure may be the same as that above described withreference to Fig. 1. By applying a wrench or other suitable tool to thenut G and turning the same in one direction or the other the shank J ofeyebolt H is drawn into or is caused to be withdrawn out of the body A.In the construction shown in Fig. 4 I avoid the provision of theremovable screw-cap E, (shown in Fig. 1 but the structure shown in Fig.4 necessitates casting the body part A around the flanged nut G.

A strain-insulator embodying the principles of construction abovedescribed is simple and efficient, as well as economical in manufacture,strong and durable, and wherein the body A and its surroundinginsulating material are held or locked against rotative movement withinthe supporting or securing cap K.

Having now set forth the object and nature of my invention, and variousstructures embodying the principles thereof, what I claim as new anduseful and of my own in vention, and desire to secure by Letters Patent,is

1. A strain-insulator having an insulated body, a flanged cap applied.to one end of said body, said cap being interiorly threaded, an eyethreaded into said cap, means for preventing displacement of the eye,means for preventing relative rotative movement of said cap and body, aneyebolt having a threaded shank extending into said body, a nut appliedto said shank, and means operatively related to the body and engagingthe nut for rotatably securing the same in position.

2. A strain-insulator comprising an insulated. tubular body providedwith a head at one end, a cap surrounding the body and inclosing thehead, means disposed between the body and cap to prevent rotation of thelatter with respect to the body, said cap being provided with interiorthreads, an eyepiece engaging the headed end of the body and providedwith threads adapted to engage the threads in the cap, means integralwith the cap adapted to prevent displacement of the eye, the other endof the body being provided with peripheral threads, a flanged nutadjacent the end of the body, a collar engaging the threads upon thefree end of the body and through which the nut is swiveled, and aneyebolt having a threaded shank passing through the nut and into thetubular body.

3. A strain-insulator having an insulated body, a flanged cap applied toone end of the body, said cap being interiorly threaded, means forpreventing relative rotary movement of the cap and body, an eye, saideye being provided with a base, said base being eXteriorly threaded andadapted to be screwed into the cap, means on said cap adapted to be bentbehind the base and within the path of its rearward movement to preventdisplacement of the eye, an eye bolt having a threaded shank extendinginto the body, a nut engaging said shank, and means operatively relatedto the body and engaging the nut for rotatively securing the same inposition.

In witness whereof I have hereunto set my hand, this 19th day of April,1905, in the presence of the subscribing witnesses.

GEORGE A. HEAD.

Witnesses:

F. W. MILLER, J. A. NICHOLS.

